解析诉 TryParse [英] Parse v. TryParse

问题描述

Parse() 和 TryParse() 有什么区别?

What is the difference between Parse() and TryParse()?

int number = int.Parse(textBoxNumber.Text);

// The Try-Parse Method
int.TryParse(textBoxNumber.Text, out number);

是否有某种形式的错误检查，例如 Try-Catch 块?

Is there some form of error-checking like a Try-Catch Block?

推荐答案

Parse 如果无法解析值则抛出异常，而 TryParse 返回一个 bool 表示是否成功.

Parse throws an exception if it cannot parse the value, whereas TryParse returns a bool indicating whether it succeeded.

TryParse 不仅仅是在内部 try/catch - 它的全部意义在于它无例外地实现，因此它很快.事实上，它最有可能实现的方式是，Parse 方法在内部调用 TryParse，然后在返回 false 时抛出异常.

TryParse does not just try/catch internally - the whole point of it is that it is implemented without exceptions so that it is fast. In fact the way it is most likely implemented is that internally the Parse method will call TryParse and then throw an exception if it returns false.

简而言之，如果您确定该值有效，请使用 Parse；否则使用 TryParse.

In a nutshell, use Parse if you are sure the value will be valid; otherwise use TryParse.

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